Justin King is one of the most respected retail figures in the UK, yet I suspect that many of the 18.5 million shoppers that use the stores have no idea who he is.
Unlike brands such as Virgin and Ryanair, the boss has not been used in television advertising. Yet the ultimate manager is vital - Sainsbury's says it's aim is to be the most trusted supermarket.
Trust takes constancy of leadership and direction - chopping and changing is soon seen in the sales isles. Mr King's last job at Sainsbury's will be one of his most important - creating a smooth handover.
Sainsbury's chief executive Justin King is to step down in July, the supermarket announced today.
Speculation surrounding Mr King's departure suggests he is set to take over from Bernie Eccleston as the next boss of Formula One.
The CEO of Sainsbury's has warned that while the British economy may be seeing positive signs of recovery, individual consumers are still finding their purchasing power reduced.
"I think what we're seeing is lots of good signs of recovery for the economy," Justin King told ITV News, "whether it be lower inflation or job creation and so on."
"But as far as individuals are concerned, they're seeing low pay rises, they're still seeing inflation - it came down yesterday but it was still 2.2% - and so on average they've got less money to spend.
"So whilst it's good news to feel that you're living and working in a country where things are getting better, in the end it's what happens to you as an individual that's going to make a difference to your shopping habits."